document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1065245>Question 1065245</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using physics, it can be shown that if a ball is thrown upwards with an initial velocity<BR>\n" );
document.write( "of 16 ft/s from the top of a building 64 ft high, then its height h above the ground t<BR>\n" );
document.write( "seconds later will be<BR>\n" );
document.write( "h(t) = 64 + 16t &#8722; 16t2<BR>\n" );
document.write( "During what time interval will the ball be at least 32 ft above the ground?\r<BR>\n" );
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document.write( "I got [0,2] but I am confused on the actual time interval.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #680372 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=680372\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Using physics, it can be shown that if a ball is thrown upwards with an initial velocity<BR>\n" );
document.write( "of 16 ft/s from the top of a building 64 ft high, then its height h above the ground t<BR>\n" );
document.write( "seconds later will be<BR>\n" );
document.write( "h(t) = 64 + 16t &#8722; 16t2<BR>\n" );
document.write( "During what time interval will the ball be at least 32 ft above the ground?\r<BR>\n" );
document.write( "\n" );
document.write( "I got [0,2] but I am confused on the actual time interval. <BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28+330%2C+330%2C+-1.5%2C+5.5%2C+-10.5%2C+80.5%2C%0D%0A++++++++++-16x%5E2+%2B+16x+%2B64%2C+32%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Plots h(t) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16t%5E2+%2B+16t+%2B64%2C+32 ALIGN=MIDDLE  ALT=\"-16t%5E2+%2B+16t+%2B64%2C+32\"   DISABLED_style= \"max-width:90%; height:auto;\" > (red), h = 32 (green)\r<BR>\n" );
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document.write( "Is it more clear now ?\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );